PHP中使用OpenSSL生成证书及加密解密

依赖于OpenSSL扩展/*加密解密*/functionauthcode($string,$operation='E'){$ssl_public=file_get_contents(DATA_PATH."

依赖于OpenSSL扩展

/*加密解密*/
function authcode($string, $operation = 'E') {
 $ssl_public = file_get_contents(DATA_PATH."/conf/cert_public.key");
 $ssl_private = file_get_contents(DATA_PATH."/conf/cert_private.pem");
 $pi_key = openssl_pkey_get_private($ssl_private);//这个函数可用来判断私钥是否是可用的，可用返回资源id Resource id
 $pu_key = openssl_pkey_get_public($ssl_public);//这个函数可用来判断公钥是否是可用的
 if(false == ($pi_key || $pu_key)) return '证书错误';
 $data = "";
 if($operation=='D'){
 openssl_private_decrypt(base64_decode($string),$data,$pi_key);//私钥解密
 }else{
 openssl_public_encrypt($string,$data,$pu_key);//公钥加密
 $data = base64_encode($data);
 }
 return $data;
}
/*生成证书*/
function exportOpenSSLFile(){
 $config = array(
 "digest_alg" => "sha512",
 "private_key_bits" => 4096, //字节数 512 1024 2048 4096 等
 "private_key_type" => OPENSSL_KEYTYPE_RSA, //加密类型
 );
 $res = openssl_pkey_new($config);
 if($res == false) return false;
 openssl_pkey_export($res, $private_key);
 $public_key = openssl_pkey_get_details($res);
 $public_key = $public_key["key"];
 file_put_contents(DATA_PATH."/conf/cert_public.key",$public_key);
 file_put_contents(DATA_PATH."/conf/cert_private.pem",$private_key);
 openssl_free_key($res);
}